氩弧熔覆TiC颗粒增强Fe基涂层组织性能研究-表面技术.PDF

第43卷摇 第5期 摇 摇 摇 表面技术 摇 摇 2014年10月 SURFACE TECHNOLOGY ·51· 試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試試 氩弧熔覆TiC颗粒增强Fe基涂层组织性能研究 王泽旺,张寰,赵程 (青岛科技大学 机电工程学院,山东 青岛266061) 摘摇 要:目的摇 研究氩弧熔覆条件下TiC颗粒增强Fe基涂层的组织和性能。 方法摇 在Fe45 自熔性合金 粉末中添加TiC颗粒,利用氩弧熔覆技术在Q235钢基材表面制备出含TiC颗粒增强的Fe基合金复合涂 层,并对熔覆层的显微组织结构、硬度分布及耐磨性能进行分析研究。 结果摇 复合涂层是由(Fe,Ni)形成 的枝晶和枝晶间的(Fe,Cr) (C,B) ,Fe (C,B)共晶组织以及TiC增强颗粒组成,TiC颗粒细小弥散分布 23 6 3 在基体金属内,部分TiC颗粒聚集生长为棒状、十字状和放射状。 结论摇 熔覆层的显微硬度最高可达 980HV,较Q235钢提高了4倍,耐磨性提高了约11倍。 关键词:氩弧熔覆;铁基自熔性合金粉末;TiC增强;复合涂层;耐磨性 中图分类号:TG174.44摇 摇 摇 文献标识码:A摇 摇 摇 文章编号:1001鄄3660(2014)05鄄0051鄄04 Study on Microstructure and Properties of TiC鄄Fe45鄄based Composite Coating by Argon Tungsten鄄arc Cladding WANGZe鄄wang,ZHANGHuan,ZHAO Cheng (College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao266061,China) ABSTRACT:Objective To study the microstructure and properties of TiC鄄Fe45鄄based composite coating by argon tungsten鄄arc cladding. Methods Through additionofTicparticlesintotheFe45 self鄄fluxingalloy powder,thecompositecoatingof Fe鄄basedal鄄 loy reinforcedbyTiCparticleswaspreparedbyargontungsten鄄arccladdingprocess. Themicrostructure,microhardnessdistribution andwearresistanceofthecoatingwereanalyzed. ResultsThecompositecoatingwascomposedofthedendritic (Fe,Ni)鄄basedma鄄 trix,interdendritic (Fe,Cr) (C,B) ,Fe (C,B) eutectic structure and TiCreinforcement particles. The TiC particles were dis鄄 23 6 3 persedly embedded into the matrix,and part of the particles were congregated into virgate,cross and radial shapes. Conclusion The microhardness of the compositecoatingcould